新疆南天山盲起苏晚石炭世侵入岩的确定及对南天山洋盆闭合时限的限定

朱志新; 李锦轶; 董连慧; 张晓帆; 胡建卫; 王克卓

新疆南天山盲起苏晚石炭世侵入岩的确定及对南天山洋盆闭合时限的限定

- 1.
  新疆大学，乌鲁木齐 830000
- 2.
  中国地质科学院地质研究所，北京 100037
- 3.
  新疆地矿局，乌鲁木齐 830011
- 4.
  新疆地调院，乌鲁木齐 830011
基金项目:
“十一五”国家科技支撑计划重点项目（编号2006BAB07B08-2）、973项目（2007CB411306）资助成果

收稿日期: 2008-07-23

修回日期: 2008-09-08

刊出日期: 2008-12-31

The age determination of Late Carboniferous intrusions in Mangqisu region and its constraints to the closure of oceanic basin in South Tianshan, Xinjiang

- 1.
  University of Xinjiang, Urumqi 830000, China
- 2.
  Institute of Geology, CAGS, Beijing 100037, China
- 3.
  BGMRED of Xinjiang , Urumqi 830011, China
- 4.
  Geological Research Academy of Xinjiang, Urumqi 830011, China

Received Date: 23 July 2008

Revised Date: 08 September 2008

Publish Date: 31 December 2008

摘要

摘要: 南天山额尔宾山中部出露的盲起苏侵入岩主要由花岗闪长岩组成,前人认为是泥盆纪产物,对其中锆石进行SHRIMP定年,获得侵入岩形成年龄296.9±5.4Ma和304.2±11.6Ma。其岩石学具有偏铝和过铝同碰撞花岗岩的特征,结合该带二叠纪后造山花岗岩及其它方面的区域资料,从而提出南天山古生代洋盆的闭合时限为晚石炭世。
- 盲起苏侵入岩 /
- SHRIMP /
- 同碰撞 /
- 洋盆闭合时限
Abstract: Granodiorite dominated Mangqisu intrusions in the middle of Erben Mountains of South Tianshan was regarded as Devonian product previously. The authors dated the intrusions using zircon SHRIMP U-Pb approach, which yielded two ages of 296.9±5.4Ma and 304.2±11.6Ma. The intrusions also have characteristics of metaluminous and peraluminous syn-collision granite petrology. Coupled with the data of post orogenic k-rich granites in Permian and other regional geological data, the authors proposed the South Tianshan Paleozoic oceanic basin have been closed in Late Carboniferous.
- Mangqisu Intrusions /
- SHRIMP /
- Syn-collision /
- Oceanic Basin Closure

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参考文献(27)

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新疆南天山盲起苏晚石炭世侵入岩的确定及对南天山洋盆闭合时限的限定

The age determination of Late Carboniferous intrusions in Mangqisu region and its constraints to the closure of oceanic basin in South Tianshan, Xinjiang

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